Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4565840 | Fiber-reinforced concrete and reinforcing material for concrete | Ryokche Cho | 1986-01-21 |
| 4560622 | Steel fiber for reinforcing concrete and production thereof | Yoshitomo Tezuka, Takeo Nakagawa | 1985-12-24 |